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49 lines
1.6 KiB
49 lines
1.6 KiB
4 months ago
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/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkCanvas.h"
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#include "SkPDFDocument.h"
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#include "SkStream.h"
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#include "Test.h"
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static void run_test(SkWStream* out, SkBlendMode mode, U8CPU alpha) {
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auto pdfDoc = SkPDF::MakeDocument(out);
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SkCanvas* c = pdfDoc->beginPage(612.0f, 792.0f);
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SkPaint black;
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SkPaint background;
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background.setColor(SK_ColorWHITE);
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background.setAlpha(alpha);
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background.setBlendMode(mode);
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c->drawRect(SkRect::MakeWH(612.0f, 792.0f), background);
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c->drawRect(SkRect::MakeXYWH(36.0f, 36.0f, 9.0f, 9.0f), black);
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c->drawRect(SkRect::MakeXYWH(72.0f, 72.0f, 468.0f, 648.0f), background);
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c->drawRect(SkRect::MakeXYWH(108.0f, 108.0f, 9.0f, 9.0f), black);
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pdfDoc->close();
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}
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// http://crbug.com/473572
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DEF_TEST(SkPDF_OpaqueSrcModeToSrcOver, r) {
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REQUIRE_PDF_DOCUMENT(SkPDF_OpaqueSrcModeToSrcOver, r);
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SkDynamicMemoryWStream srcMode;
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SkDynamicMemoryWStream srcOverMode;
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U8CPU alpha = SK_AlphaOPAQUE;
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run_test(&srcMode, SkBlendMode::kSrc, alpha);
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run_test(&srcOverMode, SkBlendMode::kSrcOver, alpha);
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REPORTER_ASSERT(r, srcMode.bytesWritten() == srcOverMode.bytesWritten());
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// The two PDFs should be equal because they have an opaque alpha.
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srcMode.reset();
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srcOverMode.reset();
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alpha = 0x80;
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run_test(&srcMode, SkBlendMode::kSrc, alpha);
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run_test(&srcOverMode, SkBlendMode::kSrcOver, alpha);
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REPORTER_ASSERT(r, srcMode.bytesWritten() > srcOverMode.bytesWritten());
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// The two PDFs should not be equal because they have a non-opaque alpha.
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}
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